diff --git a/slpkg/binaries/install.py b/slpkg/binaries/install.py
index c45447fd..4d77300d 100644
--- a/slpkg/binaries/install.py
+++ b/slpkg/binaries/install.py
@@ -27,13 +27,13 @@ class Packages(Configs):
         self.binary_packages: list = []
         self.flag_binary: list = ['-B', '--binary']
 
-    def execute(self):
+    def execute(self) -> None:
         self.view_message.install_packages(self.packages, self.mode)
         self.view_message.question()
         self.download()
         self.install_packages()
 
-    def download(self):
+    def download(self) -> None:
         """ Download packages from the repositories. """
         pkg_urls: list = []
         for pkg in self.packages:
@@ -53,14 +53,14 @@ class Packages(Configs):
         self.checksum()
         self.install_packages()
 
-    def checksum(self):
+    def checksum(self) -> None:
         """ Packages checksums. """
         md5 = Md5sum(self.flags)
         for package in self.binary_packages:
             pkg_checksum: str = BinsQueries(package, self.repo).package_checksum()
             md5.check(self.tmp_slpkg, package, pkg_checksum)
 
-    def install_packages(self):
+    def install_packages(self) -> None:
         """ Install the packages. """
         for package in self.binary_packages:
             command: str = f'{self.installpkg} {self.tmp_slpkg}/{package}'
diff --git a/slpkg/install_data.py b/slpkg/install_data.py
index 8b29c46a..1638dc16 100644
--- a/slpkg/install_data.py
+++ b/slpkg/install_data.py
@@ -78,8 +78,8 @@ class CreateData(Configs):
             'PACKAGE SIZE (uncompressed):',
             'PACKAGE DESCRIPTION:'
         ]
-        path_packages = Path(self.repos.gnome_repo_path, self.repos.gnome_repo_packages)
-        path_checksums = Path(self.repos.gnome_repo_path, self.repos.gnome_repo_checksums)
+        path_packages: Path = Path(self.repos.gnome_repo_path, self.repos.gnome_repo_packages)
+        path_checksums: Path = Path(self.repos.gnome_repo_path, self.repos.gnome_repo_checksums)
         packages_txt: list = self.utils.read_file(path_packages)
         checksums_md5: list = self.utils.read_file(path_checksums)
 
@@ -87,9 +87,9 @@ class CreateData(Configs):
             line = line.strip()
 
             if line.endswith('.txz'):
-                file = line.split('./')[1].split('/')[-1].strip()
-                md5 = line.split('./')[0].strip()
-                checksums_dict[file] = md5
+                file: str = line.split('./')[1].split('/')[-1].strip()
+                checksum: str = line.split('./')[0].strip()
+                checksums_dict[file] = checksum
 
         cache: list = []  # init cache
 
@@ -164,8 +164,8 @@ class CreateData(Configs):
             'PACKAGE SIZE (uncompressed):',
             'PACKAGE DESCRIPTION:'
         ]
-        path_packages = Path(self.repos.conraid_repo_path, self.repos.conraid_repo_packages)
-        path_checksums = Path(self.repos.conraid_repo_path, self.repos.conraid_repo_checksums)
+        path_packages: Path = Path(self.repos.conraid_repo_path, self.repos.conraid_repo_packages)
+        path_checksums: Path = Path(self.repos.conraid_repo_path, self.repos.conraid_repo_checksums)
         checksums_md5: list = self.utils.read_file(path_checksums)
 
         packages_txt: list = self.utils.read_file(path_packages)
@@ -174,9 +174,9 @@ class CreateData(Configs):
             line = line.strip()
 
             if line.endswith('.txz'):
-                file = line.split('./')[1].split('/')[-1].strip()
-                md5 = line.split('./')[0].strip()
-                checksums_dict[file] = md5
+                file: str = line.split('./')[1].split('/')[-1].strip()
+                checksum: str = line.split('./')[0].strip()
+                checksums_dict[file] = checksum
 
         cache: list = []